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/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.elasticsearch.hadoop.serialization.field;

import org.elasticsearch.hadoop.serialization.bulk.RawJson;
import org.elasticsearch.hadoop.util.StringUtils;

abstract class ExtractorUtils {

    static Object extractConstant(String value, boolean autoQuote) {
        // check for quote and automatically add them, if needed for non-numbers
        if (autoQuote && !value.startsWith("\"") && !value.endsWith("\"")) {
            // constant values
            if (!("null".equals(value) || "true".equals(value) || "false".equals(value))) {
                // try number parsing
                if (value.startsWith("-")) {
                    value = value.substring(1);
                }
                boolean isNumber = true;
                for (int i = 0; i < value.length(); i++) {
                    if (!Character.isDigit(value.charAt(i))) {
                        isNumber = false;
                        break;
                    }
                }
                if (!isNumber) {
                    value = StringUtils.toJsonString(value);
                }

            }
        }
        return new RawJson(value);
    }
}